U111E 2021 GMC Sierra Code - Lost Communication with EVAP Purge Pump
Quick Answer
Purge capacity is being reduced by technologies that improve fuel economy. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U111E 2021 GMC Sierra indicates Lost Communication with EVAP Purge Pump.
- Common causes
- Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U111E 2021 GMC Sierra Description
What are the Possible Causes of the DTC U111E 2021 GMC Sierra?
- Faulty Evaporative Emission Purge Pump
- Evaporative Emission Purge Pump harness is open or shorted
- Evaporative Emission Purge Pump circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC U111E 2021 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U111E 2021 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U111E 2021 GMC Sierra code?
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Frequently Asked Questions about U111E 2021 GMC Sierra Code
1. What are common symptoms of OBDII code U111E in a 2021 GMC Sierra related to lost communication with the EVAP purge pump?
- Common symptoms include the check engine light coming on, rough idling, decreased fuel efficiency, and potential difficulty starting the vehicle.
2. What are the possible causes of the U111E code indicating lost communication with the EVAP purge pump in a 2021 GMC Sierra?
- Possible causes include damaged wiring or connectors in the EVAP system, a faulty EVAP purge pump, issues with the ECM (Engine Control Module), or a communication network problem.
3. How can I diagnose the U111E trouble code in my 2021 GMC Sierra related to lost communication with the EVAP purge pump?
- Diagnosing the code involves using an OBDII scanner to retrieve the code, inspecting the EVAP system components and wiring for damage, checking the ECM for any faults, and ensuring proper communication within the vehicle's network.
4. What are some recommended repair tips for resolving the U111E code in a 2021 GMC Sierra?
- Repair tips include checking and repairing any damaged wiring or connectors in the EVAP system, testing and potentially replacing the EVAP purge pump, addressing any ECM issues, and ensuring all communication networks are functioning correctly.
5. Can I drive my 2021 GMC Sierra with the U111E code indicating lost communication with the EVAP purge pump?
- It is generally not recommended to drive the vehicle with this code, as it can lead to potential performance issues and may cause further damage to the EVAP system components.
6. How much does it typically cost to repair the U111E trouble code in a 2021 GMC Sierra?
- The cost of repairs can vary depending on the exact cause of the code, but it may involve expenses for parts replacement, labor, and diagnostic fees, potentially ranging from a few hundred to over a thousand dollars.
7. Is it possible to reset the U111E code in a 2021 GMC Sierra without fixing the underlying issue?
- While clearing the code may temporarily turn off the check engine light, it is not recommended to ignore the underlying problem, as it can lead to more serious issues and potentially affect the vehicle's performance and emissions.
8. Can a DIY enthusiast address the U111E code related to lost communication with the EVAP purge pump in a 2021 GMC Sierra?
- Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and address simpler issues like checking and repairing wiring connections, but more complex repairs involving components like the ECM or EVAP purge pump may require professional assistance.
9. How long does it usually take to repair the U111E trouble code in a 2021 GMC Sierra?
- The repair time can vary based on the specific issue causing the code and the expertise of the technician, but it may take anywhere from an hour to several hours or even longer for more involved repairs.
10. Are there any recalls or technical service bulletins related to the U111E code in a 2021 GMC Sierra?
- It's recommended to check with the manufacturer or a certified GMC dealership for any recalls or technical service bulletins related to the U111E code to see if there are known issues or remedies provided by the manufacturer.
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